Two talks from prominent scientists who take different approaches to looking for extraterrestrial life: Dr. Chris McKay, NASA AMES Research Center, "Searching for primitive life in the Solar System" Dr Seth Shostak, SETI Institute "Searching for intelligent life around other stars" Chris McKay studies primitive life forms in dry hostile places on Earth and uses what he has learned to design space probes that go to places like Mars and Titan. He is currently the program scientist for the Robotic Lunar Exploration Program. Seth Shostak favors using large radio telescopes to look for signals deliberately or accidentally sent by intelligent beings on a planet around a distant star. He is a frequent broadcaster on astronomical topics and is host of a one-hour weekly program on astrobiology entitled "Are We Alone?"